o/k .. I can't figure it out ! Quite often the boat has a slight list to starboard when at the slip ( according to the bubble it's about 2 deg. and it clearly shows at the waterline stripe ) It's a twin with two fuel tanks and water tanks that are cross connected ( and open ) and the heavy stuff ie. Batteries, Gen. are all in the centre. The only thing that I can think of is the galley fridge which is on the starboard side ....... could that be it ?? It's really not that big of a deal to me BUT why on occasion it's level .. ?